Filter screen cleaning device for fresh air system

Abstract

The utility model discloses a filter screen cleaning device for a fresh air system, which relates to the technical field of fresh air systems and comprises a machine body, an indoor air inlet and an indoor return air inlet are arranged on one indoor side of the machine body, an outdoor air inlet and an outdoor air outlet are arranged on one outdoor side of the machine body, and expansion pipes are arranged on the indoor return air inlet and the outdoor air inlet. A filter screen is arranged in the expansion pipe, a venturi pipe is arranged on the outer side of the expansion pipe, an air inducing pipe is arranged at an inlet of the venturi pipe, the air inducing pipe on the indoor side extends into an indoor air inlet, the air inducing pipe on the outdoor side extends into an outdoor air outlet, a contracted throat pipe section is arranged in the venturi pipe, and the throat pipe section is connected with a disinfectant box through a liquid pumping pipe. The disinfectant box is arranged on the outer side of the expansion pipe, an outlet of the Venturi pipe is connected with the wind scooper through the air supply pipe, and the air supply pipe and the wind scooper are both arranged in the expansion pipe. The filter screen cleaning device not only can clean impurities on the filter screen, but also can disinfect the filter screen, and is beneficial to improving the cleaning effect of the filter screen.

Description

Technical Field

[0001] This utility model relates to the field of fresh air system technology, specifically to a filter cleaning device for fresh air systems. Background Technology

[0002] The function of a fresh air system is to bring fresh outdoor air into the room and exhaust indoor air to the outside. For example... Figure 8 As shown, the fresh air system includes a body 1. The indoor side of the body 1 is provided with an indoor air inlet 11 and an indoor air return outlet 12. The outdoor side of the body 1 is provided with an outdoor air inlet 13 and an outdoor air outlet 14. The body 1 is equipped with a heat exchanger 15, an exhaust fan 16 and an exhaust fan 17.

[0003] Under the action of the exhaust fan 16, fresh outdoor air enters the unit 1 through the outdoor air inlet 13 and is then delivered into the room through the indoor air inlet 11, providing fresh air for the room. Under the action of the exhaust fan 17, indoor air enters the unit 1 through the indoor return air inlet 12 and is then discharged through the outdoor air outlet 14. When the fresh outdoor air and indoor air pass through the heat exchanger 15 inside the unit 1, heat exchange occurs.

[0004] To intercept impurities in indoor air, filters need to be installed at the indoor return air vents; to intercept impurities in outdoor fresh air, filters also need to be installed at the outdoor air inlets.

[0005] When indoor air is exhausted, it contains impurities such as dander and hair, which can easily clog the filter at the indoor return air vent. Similarly, when outdoor fresh air enters the unit, the impurities carried by the fresh air can also easily clog the filter at the outdoor air inlet. Therefore, the filters need to be cleaned.

[0006] For example, patent CN220321511U discloses a "Fresh Air Unit with Filter Cleaning," which uses a roller brush to scrape off impurities trapped on the surface of the primary filter. While this patent can remove impurities, the impurities have already adhered to the filter for a period of time before cleaning, making it easy for bacteria to grow on the filter, thus the cleaning effect needs improvement. Utility Model Content

[0007] To address the aforementioned shortcomings of existing technologies, this invention proposes a filter cleaning device for fresh air systems. This invention not only cleans impurities from the filter screen but also disinfects it, thereby improving the cleaning effect.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A filter cleaning device for a fresh air system includes a main body. An indoor air inlet and an indoor return air inlet are located on the indoor side of the main body, while an outdoor air inlet and an outdoor air outlet are located on the outdoor side. Both the indoor return air inlet and the outdoor air inlet are equipped with expansion tubes, each containing a filter. The cleaning mechanism includes a venturi tube located outside the expansion tubes. An air intake duct is located at the inlet of the venturi tube. The air intake duct on the indoor side extends into the indoor air inlet, and the air intake duct on the outdoor side extends into the outdoor air outlet. The venturi tube has a constricted throat section inside, which is connected to a disinfectant tank via a suction pipe. The disinfectant tank is located outside the expansion tubes. The outlet of the venturi tube is connected to an air guide hood via a supply air duct. Both the supply air duct and the air guide hood are located inside the expansion tubes.

[0010] Furthermore, the air duct is equipped with a valve.

[0011] Furthermore, both the indoor return air vent and the outdoor air inlet are detachably connected to the expansion pipe.

[0012] Furthermore, it also includes a moving mechanism, which includes a driving component, a screw, a guide rod, and a moving seat. The driving component is located on the outside of the expansion tube and is used to drive the screw to rotate. The screw and the guide rod are arranged side by side inside the expansion tube. The screw is rotatably connected to the tube wall of the expansion tube. The moving seat has a screw hole and a guide hole. The screw hole cooperates with the screw, and the guide hole cooperates with the guide rod. The moving seat is connected to the air guide cover, and the air supply pipe is a flexible hose.

[0013] Furthermore, the driving component is a drive motor.

[0014] Furthermore, the hose is made of metal bellows.

[0015] Furthermore, both the screw and the guide rod are located at the upper part of the expansion tube.

[0016] The beneficial effects of this utility model are:

[0017] 1. Compared with the prior art, the present invention can not only clean the impurities on the filter screen, but also disinfect the filter screen, prevent the growth of bacteria, and improve the cleaning effect of the filter screen.

[0018] 2. On the indoor side, when the Venturi tube forms a gas-liquid mixture of fresh air and disinfectant, the fresh air comes from the indoor air inlet; on the outdoor side, when the Venturi tube forms a gas-liquid mixture of indoor air and disinfectant, the indoor air comes from the outdoor air outlet; the disinfectant is adsorbed by the negative pressure of the Venturi tube, so the entire device does not consume energy and is energy-saving and environmentally friendly.

[0019] 3. Because both the indoor return air vent and the outdoor air inlet are detachably connected to the expansion tube, it is convenient to temporarily install the expansion tube and use it easily.

[0020] 4. By setting up a moving mechanism, the air guide hood can be driven to move horizontally left and right, increasing the cleaning and disinfection range of the gas-liquid mixture on the filter screen, reducing cleaning and disinfection dead corners, and further improving the cleaning and disinfection effect.

[0021] 5. By using metal corrugated pipes as flexible hoses, it is easier to obtain materials, which helps to improve the assembly efficiency of the entire device.

[0022] 6. By placing both the screw and guide rod inside the upper part of the expansion tube, the obstruction of the screw and guide rod to airflow can be reduced, allowing air to flow more smoothly. Attached Figure Description

[0023] Figure 1 This is a 3D diagram of a filter cleaning device for a fresh air system.

[0024] Figure 2 It is a three-dimensional assembly of filter and cleaning mechanism. Figure 1 ;

[0025] Figure 3 It is a three-dimensional assembly of filter and cleaning mechanism. Figure 2 ;

[0026] Figure 4 It is a three-dimensional assembly of filter and cleaning mechanism. Figure 3 ;

[0027] Figure 5 This is the main view of the assembly of the filter and cleaning mechanism;

[0028] Figure 6 This is a rear view of the assembled filter and cleaning mechanism;

[0029] Figure 7 This is a schematic diagram of the assembly structure of the Venturi tube, air duct, liquid extraction tube, disinfection box, and expansion tube;

[0030] Figure 8 This is a structural diagram of the background technology.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1-Unit body, 11-Indoor air inlet, 12-Indoor return air inlet, 13-Outdoor air inlet, 14-Outdoor air outlet, 15-Heat exchanger, 16-Exhaust fan, 17-Exhaust fan

[0033] 2-Expansion tube,

[0034] 3-Filter,

[0035] 41-Venturi tube, 411-Inlet, 412-Outlet, 413-Throat section, 42-Exhaust duct, 43-Suction tube, 44-Disinfectant tank, 45-Supply duct, 46-Air guide hood, 47-Valve

[0036] 51-Drive motor, 52-Screw, 53-Guide rod, 54-Moving seat. Detailed Implementation

[0037] To better understand this utility model, it will be further described below with reference to the accompanying drawings. It is worth noting that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Example 1:

[0039] A filter cleaning device for a fresh air system, such as Figure 1 As shown, the device includes a body 1. The indoor side of the body 1 is provided with an indoor air inlet 11 and an indoor air return outlet 12, and the outdoor side of the body 1 is provided with an outdoor air inlet 13 and an outdoor air outlet 14.

[0040] See Figure 1 Both the indoor return air vent 12 and the outdoor air inlet vent 13 are equipped with expansion tubes 2, which are detachably connected to each other. For example, bolts and nuts can be used to assemble the expansion tube 2 with the indoor return air vent 12, and the expansion tube 2 can be separated from the indoor return air vent 12 by removing the bolts and nuts. Similarly, the outdoor air inlet vent 13 can be assembled with the expansion tube 2 using bolts and nuts. This design allows for convenient temporary installation of the expansion tube 2 and is easy to use.

[0041] See Figure 2 A filter screen 3 is fixedly installed inside the expansion tube 2. If the filter screen 3 is made of stainless steel mesh, the perimeter of the stainless steel mesh can be welded to the inner wall of the expansion tube 2.

[0042] See Figures 2-7 The filter cleaning device for a fresh air system in this embodiment also includes a cleaning mechanism. The cleaning mechanism includes a venturi tube 41, an exhaust duct 42, a liquid extraction duct 43, a disinfectant tank 44, an air supply duct 45, an air guide hood 46, and a valve 47.

[0043] See Figure 7The venturi tube 41 is fixedly installed on the outside of the expansion tube 2. The upper end of the venturi tube 41 is provided with an inlet 411, the lower end of the venturi tube 41 is provided with an outlet 412, and the inside of the venturi tube 41 is provided with a constricting throat section 413. The inlet 411, the throat section 413, and the outlet 412 are connected in sequence.

[0044] See Figure 7 An exhaust pipe 42 is fixedly installed at the inlet 411 of the Venturi tube 41. (See also...) Figure 1 On the indoor side, the exhaust duct 42 extends into the indoor air inlet 11 at the end furthest from the venturi tube 41; on the outdoor side, the exhaust duct 42 extends into the outdoor air outlet 14 at the end furthest from the venturi tube 41. A valve 47 is installed on the exhaust duct 42.

[0045] See Figure 7 The throat section 413 of the Venturi tube 41 is connected to the disinfectant tank 44 through the liquid extraction tube 43. The disinfectant tank 44 is fixedly installed on the outside of the expansion tube 2 and contains disinfectant.

[0046] See Figure 3 The outlet 412 of the venturi tube 41 is connected to the air guide hood 46 via the air supply duct 45. Both the air supply duct 45 and the air guide hood 46 are located inside the expansion tube 2. On the indoor side, the air supply duct 45 and the air guide hood 46 are located on the side of the filter screen 3 near the indoor return air inlet 12; on the outdoor side, the air supply duct 45 and the air guide hood 46 are located on the side of the filter screen 3 near the outdoor air inlet 13.

[0047] On the indoor side, some of the fresh air blown into the room from the indoor air inlet 11 can enter the Venturi tube 41 through the air duct 42. When the fresh air entering the Venturi tube 41 is ejected through the throat section 413, the flow rate increases and the air pressure decreases. It can absorb the disinfectant in the disinfectant tank 44 through the liquid extraction pipe 43. The disinfectant mixes with the fresh air to form a gas-liquid mixture. The gas-liquid mixture is sprayed onto the filter screen 3 through the air supply pipe 45 and the air guide hood 46, blowing away the impurities on the filter screen 3 and disinfecting the filter screen 3.

[0048] On the outdoor side, some of the indoor air blown out from the outdoor air outlet 14 can enter the venturi tube 41 through the air intake duct 42. When the indoor air entering the venturi tube 41 is ejected through the throat section 413, the flow rate increases and the air pressure decreases. It can absorb the disinfectant in the disinfectant tank 44 through the liquid extraction pipe 43. The disinfectant mixes with the indoor air to form a gas-liquid mixture. The gas-liquid mixture is sprayed onto the filter screen 3 through the air supply duct 45 and the air guide hood 46, blowing away the impurities on the filter screen 3 and disinfecting the filter screen 3.

[0049] Compared with the prior art, this embodiment can not only clean the impurities on the filter screen 3, but also disinfect the filter screen 3 to prevent the growth of bacteria and improve the cleaning effect of the filter screen 3.

[0050] Furthermore, on the indoor side, when the Venturi tube 41 forms a gas-liquid mixture of fresh air and disinfectant, the fresh air comes from the indoor air inlet 11; on the outdoor side, when the Venturi tube 41 forms a gas-liquid mixture of indoor air and disinfectant, the indoor air comes from the outdoor air outlet 14; the disinfectant is adsorbed by the negative pressure of the Venturi tube 41, so the entire device does not consume energy and is energy-saving and environmentally friendly.

[0051] Example 2:

[0052] This embodiment 2 is an improvement upon embodiment 1:

[0053] In a filter cleaning device for a fresh air system in this embodiment 2, see... Figures 2-6 This also includes mobile institutions.

[0054] See Figure 3 The moving mechanism includes a drive component, a screw 52, ​​a guide rod 53, and a moving seat 54.

[0055] See Figure 2 The driving component adopts a drive motor 51, which is fixedly installed on the outside of the expansion tube 2, and the output end of the drive motor 51 is fixedly connected to the screw 52.

[0056] See Figure 3 Both the screw 52 and the guide rod 53 are arranged side by side on the upper side of the inside of the expansion tube 2. The screw 52 is rotatably connected to the wall of the expansion tube 2. The guide rod 53 is fixedly connected to the wall of the expansion tube 2.

[0057] The movable seat 54 is provided with a screw hole (not shown in the figure) and a guide hole (not shown in the figure). The screw hole is threadedly engaged with the screw rod 52, and the guide hole is slidably engaged with the guide rod 53.

[0058] See Figure 3 The movable seat 54 is fixedly connected to the air guide cover 46.

[0059] The air supply duct 45 uses a flexible hose, which is made of metal corrugated pipe. The metal corrugated pipe is an existing product that can be bent and stretched. Commonly used metal corrugated pipes are made of stainless steel, aluminum, etc.

[0060] When the drive motor 51 drives the screw 52 to rotate forward, the movable seat 54 drives the air guide shroud 46 to move horizontally from left to right; when the drive motor 51 drives the screw 52 to rotate in reverse, the movable seat 54 drives the air guide shroud 46 to move horizontally from right to left.

[0061] During the horizontal movement of the air guide shroud 46, the hose has sufficient length to accommodate the change in distance between the air guide shroud 46 and the outlet 412 of the venturi tube 41.

[0062] Because the air guide shroud 46 can move horizontally left and right, its position can be changed, increasing the cleaning and disinfection range of the gas-liquid mixture on the filter screen 3, reducing cleaning and disinfection dead corners, and further improving the cleaning and disinfection effect.

[0063] Using metal corrugated pipes as flexible hoses makes it easier to source materials and improves the assembly efficiency of the entire device.

[0064] By placing both the screw 52 and the guide rod 53 inside the upper part of the expansion tube 2, the obstruction of the screw 52 and the guide rod 53 to the airflow can be reduced, allowing the air to flow more smoothly.

[0065] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A filter screen cleaning device for a fresh air system, comprising a machine body, a filter screen, and a cleaning mechanism, an indoor side of the machine body is provided with an indoor air inlet and an indoor return air outlet, an outdoor side of the machine body is provided with an outdoor air inlet and an outdoor air outlet, characterized in that, The indoor return air outlet and the outdoor air inlet are provided with an expansion pipe, the expansion pipe is provided with the filter screen, the cleaning mechanism comprises a Venturi pipe, the Venturi pipe is arranged on the outer side of the expansion pipe, an air inlet pipe is arranged at the inlet of the Venturi pipe, the air inlet pipe on the indoor side extends into the indoor air inlet, the air inlet pipe on the outdoor side extends into the outdoor air outlet, the inside of the Venturi pipe is provided with a converging throat pipe section, the throat pipe section is connected with a disinfectant liquid tank through a liquid suction pipe, the disinfectant liquid tank is arranged on the outer side of the expansion pipe, the outlet of the Venturi pipe is connected with a guide cover through an air supply pipe, and the air supply pipe and the guide cover are arranged in the expansion pipe.

2. The filter screen cleaning device for a fresh air system according to claim 1, characterized in that, The air inlet pipe is provided with a valve.

3. The filter screen cleaning device for a fresh air system according to claim 1, characterized in that, The indoor return air outlet and the outdoor air inlet are detachably connected with the expansion pipe.

4. The filter screen cleaning device for a fresh air system according to any one of claims 1-3, characterized in that, The moving mechanism comprises a driving member, a screw rod, a guide rod and a moving seat, the driving member is arranged on the outer side of the expansion pipe, the driving member is used for driving the screw rod to rotate, the screw rod and the guide rod are arranged side by side in the expansion pipe, the screw rod is rotatably connected with the pipe wall of the expansion pipe, the moving seat is provided with a screw hole and a guide hole, the screw hole is matched with the screw rod, the guide hole is matched with the guide rod, the moving seat is connected with the guide cover, and the air supply pipe is a flexible pipe.

5. The filter screen cleaning device for a fresh air system according to claim 4, characterized in that, The driving member is a driving motor.

6. The filter screen cleaning device for a fresh air system according to claim 4, characterized in that, The flexible pipe is a metal bellows.

7. The filter screen cleaning device for a fresh air system according to claim 4, characterized in that, The screw rod and the guide rod are arranged on the upper part of the expansion pipe.

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